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Product Detailed Parameters
- Description：IC REG FLYBACK 650MA 16MSOP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Function：Step-Up/Step-Down
- Output Configuration：Positive or Negative, Isolation Capable
- Topology：Flyback
- Output Type：-
- Number of Outputs：1
- Voltage - Input (Min)：3V
- Voltage - Input (Max)：40V
- Voltage - Output (Min/Fixed)：-
- Voltage - Output (Max)：-
- Current - Output：650mA
- Frequency - Switching：40kHz ~ 1MHz
- Synchronous Rectifier：No
- Operating Temperature：-40°C ~ 125°C (TA)
- Mounting Type：Surface Mount
- Package / Case：16-TFSOP (0.118", 3.00mm Width)
- Supplier Device Package：16-MSOP
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Overview
The LT3574IMS#PBF is a monolithic switching regulator designed for isolated flyback topologies. It eliminates the need for a third transformer winding or opto-isolator by utilizing an auxiliary winding to regulate the output voltage. The device supports input voltages up to 40V and delivers an output current of 650mA. It features a fixed 1MHz switching frequency, synchronous rectification control, and operates within a temperature range of -40°C to 125°C.
Feature Summary
- Integrated regulation via auxiliary transformer winding removes requirement for opto-isolators
- Synchronous rectification control enhances efficiency in low-voltage secondary applications
- Fixed high-frequency operation minimizes external component size
Applications
- Isolated DC-DC converters requiring galvanic isolation without optocouplers
- Low-power industrial power supplies
- Telecommunications equipment with isolated rails
Procurement Notes
Verify package integrity upon receipt, as the MSOP-16 housing is sensitive to mechanical stress. Confirm the suffix #PBF indicates lead-free compliance per RoHS standards. Cross-reference the manufacturer part number LT3574IMS#PBF with official Analog Devices documentation to ensure authenticity and correct revision level before integration into production designs.
Selection Notes
Select this component when design constraints prohibit the use of opto-isolators or additional feedback windings. It is suitable for applications requiring moderate isolation voltage and currents up to 650mA. Ensure the transformer design accommodates the auxiliary winding requirements for proper regulation. Consider thermal management capabilities given the operating temperature range limits.
Part Context
This part belongs to the LT3574 family of isolated flyback regulators from Analog Devices. It shares architectural similarities with other non-isolated buck-boost controllers but is distinct in its ability to handle galvanic isolation through transformer-based feedback. The IMS#PBF designation specifies the MSOP-16 package and lead-free finish.
Replacement Considerations
Direct substitutes include other Analog Devices flyback controllers such as the LT3574IMSE#PBF (SOIC-16 package). Verify pin compatibility and thermal performance characteristics when transitioning between package types. No cross-brand replacements are confirmed in public documentation.
